ALDO ASCARI

Una costruzione "manuale" di matrici idempotenti di ordine 3

Pages 45-48
Received: 23 April 1993  
AMS Classification : 65F99

Abstract A simple set of formulae is offered for the construction of an idempotent matrix of order 3, with an arbitrary choice of the rank (1 or 2) and of four of its nine elements.